Allow embedder to use custom cryptography in Autofill table.

components/autofill/core/browser/webdata/autofill_table_encryptor_factory.h

Index: components/autofill/core/browser/webdata/autofill_table_encryptor_factory.h
diff --git a/components/autofill/core/browser/webdata/autofill_table_encryptor_factory.h b/components/autofill/core/browser/webdata/autofill_table_encryptor_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..99bd08d11cb927b2b7f6c4d8e618106dfb32fa83
--- /dev/null
+++ b/components/autofill/core/browser/webdata/autofill_table_encryptor_factory.h
@@ -0,0 +1,48 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.

[please use gerrit instead, 2017/02/22 19:05:42]

no "(c)" necessary

[devarajn, 2017/02/22 19:24:26]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_WEBDATA_SERVICES_AUTOFILL_TABLE_ENCRYPTOR_FACTORY_H_
+#define COMPONENTS_WEBDATA_SERVICES_AUTOFILL_TABLE_ENCRYPTOR_FACTORY_H_
+
+#include <memory>
+
+#include "base/memory/singleton.h"
+#include "base/sequence_checker.h"
+#include "components/autofill/core/browser/webdata/autofill_table_encryptor.h"
+
+namespace autofill {
+// Factory for creating Autofill table encryptor.

[please use gerrit instead, 2017/02/22 19:05:42]

The comment should be on AutofillTableEncryptorFactory, not on
DefailtSingletonTraits.

[devarajn, 2017/02/22 19:24:26]

Done.

+// If |delegate_| is set, then |delegate_| is used to create encryptor,
+// else default encrytor (SystemEncryptor) is returned.
+template <typename T>
+struct DefaultSingletonTraits;

[Roger McFarlane (Chromium), 2017/02/22 19:29:50]

This isn't doing what you want. It's declaring DefaultSingletonTraits<T> in the
autofill namespace. But, you're already bringing it in via
base/memory/singleton.h.

If you want to forward declare this...

// This goes outside of namespace autofill and remove the singleton include.
namespace base {
template typename<T> struct DefaultSingletonTraits;
}  // namespace

[devarajn, 2017/02/22 22:07:59]

Yeah, I realized it. This was a good catch!

+class AutofillTableEncryptorFactory {

[please use gerrit instead, 2017/02/22 19:05:42]

Very strange to have autofill::DefaultSingletonTraits and
base::DefaultSingletonTraits in the same file. Should this forward declaration
be removed?

[devarajn, 2017/02/22 19:24:26]

removed base:: one.
Done

+ public:
+  // Embedders are recommended to use this delegate to inject
+  // their encryptor into Autofill table.
+  class Delegate {

[please use gerrit instead, 2017/02/22 19:05:42]

Need a virtual empty destructor.

[devarajn, 2017/02/22 19:24:26]

I am not sure how I missed this.
Done

+   public:
+    virtual std::unique_ptr<AutofillTableEncryptor> Create();

[please use gerrit instead, 2017/02/22 19:05:42]

= 0;

+  };
+
+  static AutofillTableEncryptorFactory* GetInstance();
+
+  std::unique_ptr<AutofillTableEncryptor> Create();
+
+  void SetDelegate(std::unique_ptr<Delegate> delegate);
+
+ private:
+  AutofillTableEncryptorFactory();
+  ~AutofillTableEncryptorFactory() {}

[Roger McFarlane (Chromium), 2017/02/22 18:32:56]

move the implementation to the cc file.

[devarajn, 2017/02/22 18:56:58]

Yup I am on it, just saw below link
https://www.chromium.org/developers/coding-style/chromium-style-checker-errors.

I am building linux-build locally for sanity check and its really really slow :(
Is it possible for me to use try servers directly?

[Roger McFarlane (Chromium), 2017/02/22 19:59:44]

# after git cl upload
git cl try


I think you need to have a chromium.org account, though.

+
+  std::unique_ptr<Delegate> delegate_;
+  base::SequenceChecker sequence_checker_;
+
+  friend struct base::DefaultSingletonTraits<AutofillTableEncryptorFactory>;
+  DISALLOW_COPY_AND_ASSIGN(AutofillTableEncryptorFactory);
+};
+
+}  // namespace autofill
+
+#endif  // COMPONENTS_WEBDATA_SERVICES_AUTOFILL_TABLE_ENCRYPTOR_FACTORY_H_